Tool-holder.



W. H. TAYLOR.

TOOL HOLDER.

APPLICATION FILED APR. 24, 1911.

Patented Dec. 12, 1911.

I 1 a g a m COLUMBIA PLANOGRAPH 60., WASHINGTON, D. c.

g section of the tool.

tion at the line 33 of Fig. 2. Fig. 4, is

UNITED STATES PATENT OFFICE.

WILLIAM H. TAYLOR,

0F FLINT, MICHIGAN.

TOOL-HOLDER.

To all whom it may concern:

Be it known that I, WILLIAM H. TAYLOR, a citizen of the United States,residing at Flint, county of Genesee, State of Michigan, have invented acertain new and useful Improvement in Tool-Holders, and declare thefollowing to be a full, clear, and exact description of the same, suchas will enable others skilled in the art to which it pertains to makeand use the same, reference being had to the accompanying drawings,which form a part of this specification.

This invention relates to tool holders.

It has for its object an improved tool holder adapted to adjustably holda lathe tool therein and to be itself held in position in the ordinarytool post.

In the drawings :F igure 1, is an elevation in a tool post. Fig. 2, is alongitudinal Fig. 3, is a cross seca cross section at the broken line 44of Fig. 2.

The tool comprises the shank 1 adapted to engage in the tool post 2 of alathe and to be secured therein by a set screw 3. The tool is providedwith a diagonal slot 4 that traverses the shank 1 from the front to thebottom of the shank, (considering that part the bottom which lies lowestwhen the tool is in position in the post). From the slot 4 which servesas a guide way for the bit 6, (the hardened cutting bit) of thestructure, a passage 7 extends to the rear of the tool which for a partof its length is threaded for an adjusting screw 8. In front of thethreaded part, which extends from 8 to 8 there is clearness for the freeaction of the shank of the screw 8 and at the rear of the threaded partis a cylindrical opening 9 in which engages a sleeve 10, sleeved on theshank of the screw 8 and held to slide as the screw advances by a pin 11that engages through a sleeve into an annular race 12 on the shank ofthe screw. The head of the screw terminates with a graduated head 13 bymeans of which the screw is turned.

The sleeve 10 is provided with a key way 1 1 in which engages a key 15that projects into it from the shank 1. The key 15 Specification ofLetters Patent.

Application filed April 24, 1911.

Patented Dec. 12, 1911. Serial No. 622,918.

allows the sleeve 10 to slide but prevents it from turning with thescrew 8. The short pin 11 requires the sleeve to slide with the shank ofthe screw 8 and maintains the graduated head 13 always in properrelation to the end of the sleeve which is provided with an index line(not shown). The cutting bit member 6 slides in the rectangular slot 4driven forward by the screw, driven backward by a pressure on the end ofit and held in position by set screw 15 which engages through the shankand against the bit 6.

The particular use of this adjustable tool holder is in connection withthe tool carriage as a secondary or auxiliary tool to furnish, in asecond tool post mounted on the carriage, a tool, which may beaccurately and quickly adjusted with reference to the work and to theprimary tool held on said carriage. Carriages with the secondary toolposts are in common use and the primary tool is easily adjusted byordinary and well known methods, but the secondary tool which it issometimes very desirable to use in connection with the primary tool isonly adjustable by trial, so far as I am at present advised and theespecial object of this invent-ion is to produce a tool which may beadjusted through its holder to a limited degree to bring about thatclose adjustment between itself and another tool that is necessary forquick and accurate work where both tools are used.

What I claim is A tool holder for lathe work, comprising a shank havinga slot for holding the cutting bit therein, a sleeve slidable in anopening in said shank, a screw rotatable in said sleeve, engaging insaid shank and against the cutting bit, and a graduated head on saidscrew revoluble against one end of said slidable sleeve, substantiallyas described.

In testimony whereof, I sign this specification in the presence of twowitnesses.

WILLIAM H. TAYLOR. V

Witnesses:

CHARLES F. BURTON, VIRVINIA C. SPRATT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

